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Natural Selection

The process by which organisms gradually change over time is: EVOLUTION
Darwin's first observations of natural selection involved: finches (birds)
Only members of the same ____ can mate with one another. species
A ____ includes all members of the same species in an area at the same time. population
Differences in traits in a population is called genetic ___. variation
______ are traits that help an organism survive in its environment. Adaptations.
When humans interfere and breed plants/animals for certain traits, that is called _____ ______. artificial selection
___________ is the competition where organisms either survive (win) or die (lose). Natural selection
In order for natural selection to occur, there must be (4 things): overpopulation, genetic variation, adaptation, selection
When all members of a species have died, they have gone ___. extinct
Name two possible causes of extinction. change in environment (loss of habitat/food) and increased competition for resources
Created by: doakes27